For negatively supercoiled circle W < 0 

For a positively coiled superhelix W > 0.

 

TLS Online TPP Program

#Id: 8847

#Unit 2. Cellular Organization

When CDK activity is low= helicases are loaded in G1

When CDK activity is high= helicases are activated in

S, G2 & M

TLS Online TPP Program

#Id: 7024

#Unit 5. Developmental Biology

The somatic cells of the hub create asymmetric proliferation by secreting the paracrine factor Unpaired onto the cells attached to them

TLS Online TPP Program

#Id: 9038

#Unit 4. Cell Communication and Cell Signaling

The levels of insulin present in the body and the Kd for binding of insulin to its receptor on liver cells,

1.4 × 10−10 M (0.14 nM). The normal concentration of insulin in the blood is  5 × 10−12 M. 

The fraction of insulin receptors with bound insulin, [RL]/[RT], at equilibrium as 0.0344

TLS Online TPP Program

#Id: 8006

#Unit 10. Ecological Principles

The differentiation of niches that enables similar species to coexist in a community is called resource partitioning.

TLS Online TPP Program

#Id: 598

#Unit 2. Cellular Organization

Like the Lambda repressor, the cII protein is a transcriptional activator. It binds to a site upstream of a promoter called PRE (for repressor establishment) and stimulates transcription of the cI (repressor) gene from that promoter.